PC IR Transmission
PC IR Transmission
(OP)
Hello,
I'm searching for the absorption / transmission spectra of polycarbonate in the infrared at wavelength at about 10µm. The background is to use PC as an optical shielding of the CO2 Laser radiation more specific against 10,6µm straylight.
Does anyone know where to get it?
Best regards
I'm searching for the absorption / transmission spectra of polycarbonate in the infrared at wavelength at about 10µm. The background is to use PC as an optical shielding of the CO2 Laser radiation more specific against 10,6µm straylight.
Does anyone know where to get it?
Best regards





RE: PC IR Transmission
Regards
Pat
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RE: PC IR Transmission
More precisely I'm for the extiction coefficient for PC at 10600nm, which is the wavelength of the CO2 Laser.
I know that PC is used as absorber Material for laser application using CO2 Laser, but without knowing the (more or less) exact values of the absorption coefficients it is problematic to calculate a required thickness of a PC plate.
Regards
RE: PC IR Transmission
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Harold
SW2009 SP2.0 OPW2009 SP0 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
www.lumenflow.com
RE: PC IR Transmission
I think that is inadequate information for you. Maybe Sabic, or Dow or Mitsubishi Gas or Bayer Materials Science can provide details at your specified wavelengths.
You could of course buy a 3mm thick sheet and measure it yourself and calculate from there.
Regards
Pat
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RE: PC IR Transmission
Furthermore it seems that these PC's do have additional coatings maybe dielectric coatings which makes them very expensive and which gives you an totally different reflection/absorption/transmission spectra of the plate.
Also at the named sites of the manufacturs of PC until now I could not find helpful information, so I'm going on searching.
What I'm looking is the spectra of pure simple polycarbonate or maybe also simple PMMA
Regards
RE: PC IR Transmission
You can chew up a lot of time researching and testing materials or spend the money for certified materials. I've never had much luck finding curves beyond 800nm or so (depending on the material since most applications are for day light/visible). I can't know all the restrictions you are dealing with, but that's my two cents. Best of luck.
Harold
SW2009 SP2.0 OPW2009 SP0 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
www.lumenflow.com
RE: PC IR Transmission
Seems to me to be highly dubious to "roll" your own approach. One lost eye will cost you and your company far more than the cost of using the appropriate materials.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: PC IR Transmission
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules